Coil winding device



May 16, 1944.

J. A. EARL 2,348,889

COIL WINDING DEVICE Filed March 4, 1943 2 Sheets-Sheet 1 INVENTOR.

HTTOE/VEY I 11.1% 1944. J. A. EARL 2348889 COIL WINDING DEVICE INTOR.

AEL.

fiTTOE/VEY drawn through the apertures.

Patented May 16, 1944 UNITED STATES ems:

comwmpnsonavrcs lohnaEar-hlaGrangallha-laignortowestern mm Com PM! N.Y., a corporation Incorporated, New York, of New York Application March4, 194:, Serial No. 478,037

(Cl. ca-4) 6 Claims.

This invention relates to coil winding devices and more particularly todevices for manually winding toroidal coils.

An object oi the invention is to provide a simple and practicable devicefor eificiently and economically winding toroidal coils manually.

In accordance with the above object, the present invention, in oneembodiment thereof, as applied to the winding of toroidal coils of acertain type used in the electrical arts, the dimensions of the coilsbeing so minute that automatic winding machines cannot be employedpractically, comprises a pair of plates each fixed to and extendingperpendicularly from base members connected together by a hinge, thearrangement being such that the plates are maintained in predeterminedrelation when the base members are normally supported upon their lowerfaces. The upper ends of the plates are apertured and are counterboredin opposite directions to provide a circular recess for holding anannular core during the winding of a fine wire helically thereon to forma toroidal coil. A plurality of circularly arranged apertures areprovided in the plates about the axis of the recess, the apertures ineach plate being aligned with the apertures of the other plate when theplates are abutted. Formed in the plates and extending radially fromeach aperture and into the recess is a narrow slit. In using the device,a core is mounted in the recess and then an ordinary sewing needlehaving a e wire threaded therethrough is passed through a set of. thealigned circularly arranged apertures from one side of the device untilapprommately one-half of the length of wire is Thereafter, the needle ispassed through the core opening from the opposite side and then throughthe set of apertures next to the first set of apertures and continuingaround the core in one direction to complete one-half the number ofconvolutions the wire being pulled through a slit each time, thusaccurately guiding the wire and positioning, in spaced relation, theconvolutions of wire on the core. The needle is then removed from thewire and the opposite end is threaded theret and the operations repeatedfor the other of the core in similar manner.

Other objects and advantages oi the invention will more fully ar fromthe following detailed desc ption, taken in conjunction with the --i:-s, in which Fig. l is an end view of a toroidal coil winding deviceembodying the features at the invention shown mounted on a bench fixtureat a convenient angle for an operator who faces the left hand sidethereof;

. 2 is enlarged fragmentary side view oi" the upper end of the devicetaken on the line 2-2 of Fig. 1;

Fig. 3 is a vertical section taken on the line H of Fig. 2, showing atoroidal core in position for winding and the manner of winding the wireconvolutlons thereon; and

r'lgcisanenlargedperspectiveviewoia. toroidal coll after-completion andremoval from the winding device.

Referring to the drawings in detail, I. and II indicate base membershinged together, as indicated at l2, and channel-shaped at their lowerfaces to provide projecting foot-like supporting portions i3. Inneropposed vertical faces ll of the base members I. and II are slotted atIt and fixed therein are perpendicularly extending plates ll, havingtheir outer faces, which are shown abutting in Fig. 1,1in the plane ofthe faces M of the base members. It will be apparent, with the basemembers II and II hinged in the manner shown, coincident with theirinner faces N, that when the device is resting upon the portions I! oris mounted at an angle on a bench fixture, indicated in'general at ll,inner faces IQ of the plates II will be maintained in abutting relation.To separate the plates ll, one or the other of the plates or basemembers is grasped and slightly elevated, whereupon the platesreadily,separate.

The plates ll, at their upper ends, which are reduced in thickness fromthe point 20 outward- 1y, as shown in Fig. 3, are each formed with acounterbored aperture 2|, the apertures being oppositely directed and inalignment when the plates are abutted. With the plates I! thuspositioned. the larger diameters of the apertures 2| form a circularrecess 24 open at both ends for .ireely peripherally receiving andsupporting a toroidal core 25 placed in the aperture in one of theplates when the plates are separated. the

. core being prevented from moving axially from the recess when theplates are abutting by annular shouldered faces 26 at the Juncturesbetween the larger and smaller diameters of the apertures 2 I. Formed ineach of the plates I! in circular arrangement and spaced a suitabledistance from and radially about the axis of the apertures 25 are aplurality of equally spaced apertures 21!, which are tapered at theirouter ends as indicated at 28. In the present embodiment, forty suchapertures 21 are provided and the apertures in one plate ii ar inalignment with the apertures in the companion plate when the plates areabutted as shown in Fig. 3. Extending radially from each of theapertures 21! and into the recess 26 in each plate H, is a marrow slit8!, the inner ends of the material between the slits belng rounded orblunted, as shown at 32L To insure accurate client of the apertures 2t,27! and slits 8! of each plate 87 with those of the companion plate incase of play or looseness at the hinge it when the plates II areabutted. one of the plates carries a fixed pin 33 which enters anaperture 34 in the other plate and insures accurate alignment or thegplllates and thus the described apertures and In the use of the device,the plates" are separated in the manner previously described and a core26 is placed in the aperture 2| of one of the plates l'l. After abuttingthe plates 11, the core 25 wilij be contained in the recess 24 and uponeither resting the device upon its foot-like portions it on a horizontalsupport, or, as shown in Fig. l in the bench fixture is, in whichit'isarranged at a convenient angle for an operator, the plates 11 willbe maintained in abutting relation to-holdthe core 2i' therebetween. Theoperator then uses an ordinary sewing needle 35 (Figs-l and Brwith afine wire 36 of suitable length threaded therethrough and passes theneedle through 6ne*'set of the aligned circularly arranged apertlires21- from the forward side of the device to the rear side thereof andthen passes it through-the center of the core to the-forward side;l'ih'e wire is drawn sufficiently taut to move it through the slit llcommunicatingwith the particular aperture 21 and into engagement withand around the core. The slit 3i serves to definitely guide-the wire 36and position the convolutioii'lthereof' on the corefl and spaces itfroinf'the adjacent convolutions' of wire to he would "on the core. Apreferred manner of winding the bore 25 comprises drawing approximatelyone-half of the wire through the first set. of apertures 21 and thencontinuing around .the core ineither direction to complete succesiveconvolutions 'in the manner above described until one-half of theconvolutions are completed.-

To retain the end of the wire to opposite the end threaded through-theneedle 35, it lswrapped around a pin ti on the plate H at the forwardside of-the device. Thereafter, the needle 35 is removed from the wire36 and a suificient len h ofvwire remains to provide a terminal or leadportion' ffl (Fig. 4) The opposite end of the wire ii is then detachedfrom the pin 31 and threaded onto the needle l and thewiring of theother half of the core li'is started in a direction opposite tothe'first winding operations by threading' the wire 381 first throughthe center of the core it the'forward side of the device and then fi'rcm'th jrear side of the device through the set adjacent the first set ofapertures used'inwindinffthe'Tfirst half of the core, the operationscontinuing until the entire core is wound, whereupon the needle isremoved from the wire and a sufficient length of wire remains to providea terminal or lead portion 39 (Fig. 4)

Before removing the wound coil from the device by separating the platesH in the manner previously described, astrand ll of insulating materialis threaded through the center of the .coil and tied at a point betweenthe two convolutions of.wire .,which terminate with the lead portions38' andflsztp insure complete separation thereof and,thu s preventa.drop in the potential of the coil. Also, before the removal of the woundcoil from, the is v d through the center of the coil. The pin ll serv asa means for mounting the coil in the mechanism on which the coil isused.

It will be understood that although, in the emshown in the drawings.

bodiment of the device shown and described, the apertures 21 and slits3| are equally spaced completely around the recess 24 for winding 0.parvaried for other types of coils. For instance, the convolutions ofwire may be arranged in spaced ,ticular form of coil, this arrangementmay be' groups and further that the slits 3| in certain arrangements ofconvolutions could be arranged parallel to each other instead ofextending radially relative'to the axis-of the recess 14, as Also, it isnot necessary that the plates be abutted in all cases, as is shown forthe-particular coil being wound.

All

It will be understood that the embodiment herein described is merehrillustrative of the invention and one application'thereof and thatmodifications can be made and it is capable of other applications.

Whatisclaimed'isr a.

l. A device for manually winding toroidal coils comprising means forsupporting a core, said means being slitted at a plurality of pointsextending outwardly from and communicating with a core supported thereonto guide a strand to be annularly wound with the convolution: thereof inspaced relation upon the core.

2. A device for manually winding toroidal coils comprising recessedmeans for supporting a core therein, said means being slitted at aplurality of points extending outwardly from the recess and openingthereinto to guide a strand to be annularly wound with the convolutionsthereof in spaced relation upon the core.

3. A device for manually winding toroidal coils comprising a pair ofapertured members effective when predeterminedly associated with eachother to support a core in the apertures thereof, said members beingslitted at a plurality of points extending outwardly from the innerperipheries of the apertures to guide a strand to be annularly wound inspaced relation upon the core.

4. A device for manually winding toroidal coils comprising a pair ofapertured members effective when predeterminedly' associated witheach'other to support a core in the apertures thereof, said membershaving a plurality of radially directed slits extending outwardly" fromthe inner peripheries of the apertures to guide a strand to be core inthe apertures thereof, said members bedevice, a pin ll ofinsulatingmaterial ing slitted at a plurality of equally spaced pointsextending outwardly from the inner peripheries of the apertures to guidea strand to be annularly V [wound in equally spaced relation upon thecore.

6. A device for manually winding toroidal coils comprising a pair'ofhinged members adapted to be abutted and having'alignable counterboredoppositely directed apertures providing a recess for supporting a coretherein, said members being slitted at a plurality of points extendingout-v wardly from the recess and opening thereinto to guide a strand tobe wound with the convolutions thereof in spaced relation upon the'core.

JOHN A. EARL.'

